# Legacy Animation system

> Unity's Legacy animation system has a limited feature set that predates Mecanim. Legacy is still available for backward compatibility with old Unity projects.

Unity's Legacy animation system (Legacy) has a limited feature set that predates Mecanim. Legacy is still available because it is easier to use and provides better performance for simpler animations.

| **Topic**                                                                                                             | **Description**                                              |
| --------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ |
| **[Introduction to Legacy Animation system](/engine/6000.6/manual/animation-section/animation-legacy/animations.md)** | Understand how to work with Unity's Legacy Animation system. |
| **[Legacy Animation component](/engine/6000.6/manual/animation-section/animation-legacy/class-animation.md)**         | Reference for the Legacy Animation component.                |

## Additional resources

* [Animation tab](/engine/6000.6/manual/assets-and-media/asset-types/models/importing/class-animation-clip.md)
* [Importing a model](/engine/6000.6/manual/assets-and-media/asset-types/models/importing/importing-model-files.md)